Results 41 to 50 of about 37,871 (243)
Cosmological Footprints of Loop Quantum Gravity [PDF]
Physical Review Letters, 2009 Accepted by Phys. Rev.
Julien Grain, Aurélien Barrau
openalex +7 more sources
Loop Quantum Cosmology, Modified Gravity and Extra Dimensions
Universe, 2016 Loop quantum cosmology (LQC) is a framework of quantum cosmology based on the quantization of symmetry reduced models following the quantization techniques of loop quantum gravity (LQG).
Xiangdong Zhang
doaj +1 more source
Loop cosmological dynamics and dualities with Randall-Sundrum braneworlds [PDF]
, 2006 The discrete quantum geometric effects play an important role in dynamical evolution in the loop quantum cosmology. These effects which are significant at the high energies lead to the quadratic energy density modifications to the Friedmann equation, as ...
A. Ashtekar +6 more
core +3 more sources
Consistent loop quantum cosmology [PDF]
Classical and Quantum Gravity, 2009 A consistent combination of quantum geometry effects rules out a large class of models of loop quantum cosmology and their critical densities as they have been used in the recent literature. In particular, the critical density at which an isotropic universe filled with a free, massless scalar field would bounce must be well below the Planck density. In
openaire +3 more sources
Hybrid models in loop quantum cosmology [PDF]
International Journal of Modern Physics D, 2016 In the framework of Loop Quantum Cosmology (LQC), inhomogeneous models are usually quantized by means of a hybrid approach that combines loop quantization techniques with standard quantum field theory methods. This approach is based on a splitting of the phase space in a homogeneous sector, formed by global, zero-modes and an inhomogeneous sector ...
Navascues, B.E. +3 more
openaire +7 more sources
Loop quantum cosmology: an overview [PDF]
General Relativity and Gravitation, 2009 A brief overview of loop quantum cosmology of homogeneous isotropic models is presented with emphasis on the origin of and subtleties associated with the resolution of big bang and big crunch singularities. These results bear out the remarkable intuition that John Wheeler had. Discussion is organized at two levels.
openaire +4 more sources
Data‐Driven Review on Aerogels and Polymeric Aerogels
Angewandte Chemie, Volume 137, Issue 28, July 7, 2025.A review goes to data‐driven. An exhaustive literature survey provides an overview of research status on aerogels, a category of highly porous solids with unique physicochemical properties. Statistical/data‐driven analysis tells us positive/negative aspects; aerogels have a promising potential to contribute to emerging energy/environmental issues ...
Satoru Takeshita +2 more
wiley +2 more sources
Equivalence of Models in Loop Quantum Cosmology and Group Field Theory
Universe, 2019 The paradigmatic models often used to highlight cosmological features of loop quantum gravity and group field theory are shown to be equivalent, in the sense that they are different realizations of the same model given by harmonic cosmology.
Bekir Baytaş +2 more
doaj +1 more source
Superinflation in loop quantum cosmology [PDF]
Physical Review D, 2008 11 pages, 2 figures.
Edmund J. Copeland +3 more
openaire +3 more sources
Inflationary Cosmology and Quantization Ambiguities in Semi-Classical Loop Quantum Gravity [PDF]
, 2004 In loop quantum gravity, modifications to the geometrical density cause a self-interacting scalar field to accelerate away from a minimum of its potential.
A. Ashtekar +30 more
core +3 more sources